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	Changes in TIFF v3.9.0
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<B><FONT SIZE=+3>T</FONT>IFF <FONT SIZE=+2>C</FONT>HANGE <FONT SIZE=+2>I</FONT>NFORMATION</B>
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<B>Current Version</B>: v3.9.0<BR>
<B>Previous Version</B>: <A HREF=v3.9.0beta.html>v3.9.0beta</a><BR>
<B>Master Download Site</B>: <A HREF="https://download.osgeo.org/libtiff">
download.osgeo.org</a>, directory pub/libtiff</A><BR>
<B>Master HTTP Site</B>: <A HREF="http://www.simplesystems.org/libtiff/">
http://www.simplesystems.org/libtiff/</a> 
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<P>
This document describes the changes made to the software between the
<I>previous</I> and <I>current</I> versions (see above).  If you don't
find something listed here, then it was not done in this timeframe, or
it was not considered important enough to be mentioned.  The following
information is located here:
<UL>
<LI><A HREF="#hightlights">Major Changes</A>
<LI><A HREF="#configure">Changes in the software configuration</A>
<LI><A HREF="#libtiff">Changes in libtiff</A>
<LI><A HREF="#tools">Changes in the tools</A>
<LI><A HREF="#contrib">Changes in the contrib area</A>
</UL>
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<A NAME="highlights"><B><FONT SIZE=+3>M</FONT>AJOR CHANGES:</B></A>

<UL>
	<li> All of the major changes since 3.8.0 were incorporated in
	the v3.9.0beta release.  This is a stable release from a
	stable maintenance branch which incorporates many bug and
	security fixes needed by existing users of 3.X.X series
	libraries.  Any future major changes will be in the 4.0.X
	series of releases.

</UL>


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<A NAME="configure"><B><FONT SIZE=+3>C</FONT>HANGES IN THE SOFTWARE CONFIGURATION:</B></A>

<UL>

	<li> Updated autotools: Autoconf 2.64, Automake 1.11, libtool
	2.2.6.

	<li> Enabled support for Automake silent build rules
	(--enable-silent-rules or 'make V=0')

	<li> Enabled support for Automake colorized tests.

	<li> Added detection of a 64-bit integer type so that bundled
	utilities (like tiffcrop) can use it when necessary.  Note
	that this version of libtiff does not require a 64-bit integer
	type but libtiff 4.0 does.

</UL>

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<A NAME="libtiff"><B><FONT SIZE=+3>C</FONT>HANGES IN LIBTIFF:</B></A>

<UL>
	<li> libtiff/{Makefile.am, Makefile.v}: Do not distribute
	tiffconf.h, remove tif_config.h/tiffconf.h during cleaning. As
	per bug <a
	href="http://bugzilla.remotesensing.org/show_bug.cgi?id=1573">http://bugzilla.remotesensing.org/show_bug.cgi?id=1573</a>

	<li> tif_dirinfo.c: _TIFFMergeFields() now only merges in
	field definitions that are missing.  Existing definitions are
	silently ignored.  (Bug #1585)

	<li> tif_write.c: Rip out the fancy logic in
	TIFFAppendToStrip() for establishing if an existing tile can
	be rewritten to the same location by comparing the current
	size to all the other blocks in the same directory.  This is
	dangerous in many situations and can easily corrupt a file.
	(observed in esoteric GDAL situation that's hard to document).
	This change involves leaving the stripbytecount[] values
	unaltered till TIFFAppendToStrip().  Now we only write a block
	back to the same location it used to be at if the new data is
	the same size or smaller - otherwise we move it to the end of
	file.

	<li> tif_dirwrite.c: Try to avoid writing out a full
	readbuffer of tile data when writing the directory just
	because we have BEENWRITING at some point in the past.  This
	was causing odd junk to be written out in a tile of data when
	a single tile had an interleaving of reading and writing with
	reading last.  (highlighted by gdal
	autotest/gcore/tif_write.py test 7.

	<li> tif_predict.c: use working buffer in PredictorEncodeTile
	to avoid modifying callers buffer.  <a
	href="http://trac.osgeo.org/gdal/ticket/1965">http://trac.osgeo.org/gdal/ticket/1965</a>

	<li> tif_predict.c/h, tif_lzw.c, tif_zip.c: Improvements so
	that predictor based encoding and decoding works in read-write
	update mode properly.  <a
	href="http://trac.osgeo.org/gdal/ticket/1948">http://trac.osgeo.org/gdal/ticket/1948</a>

	<li> configure.com, libtiff/tif_vms.c: Better OpenVMS
	support. Patches from Alexey Chupahin.

	<li> tif_fax3.c: fix leak of FAXCS state (per bug 1603).

	<li> tif_fax3.c: Make find0span() and find1span() non-inline
	to make MSVC 6.0 compiler happy.

	<li> tif_codec.c: Avoid NULL pointer dereferencing for exotic
	compression codec codes.

	<li> tif_dirread.c: zero tif->tif_dir after freeing the
	directory in TIFFReadCustomDirectory().  I don't exactly
	remember why this was important.

	<li> tif_dirwrite.c: Fix potential memory leak writing large
	double tags.

	<li> tif_dirread.c: Fix unchecked malloc result.

	<li> libtiff/tif_lzw.c: Properly zero out the codetable. As
	per bug <a
	href="http://bugzilla.maptools.org/show_bug.cgi?id=1929">http://bugzilla.maptools.org/show_bug.cgi?id=1929</a>

	<li> libtiff/tif_lzw.c: Properly zero out the string
	table. Fixes CVE-2008-2327 security issue.

	<li> libtiff/tif_jbig.c: Support the JBIG-KIT 2.0
	(compatibility with the older versions retained).

	<li> libtiff/tif_getimage.c,tiffio.h: removed all use of
	UaToAa and Bitmap16to8 arrays in TIFFRGBAImage structure to
	restore ABI compatibility.  These were just an attempt to
	speed up processing with precalculated tables.  <a
	href="http://bugzilla.maptools.org/show_bug.cgi?id=1979">http://bugzilla.maptools.org/show_bug.cgi?id=1979</a>

	<li> libtiff/tif_codec.c: Avoid printing c->name if it does not exist.

	<li> libtiff/tif_getimage.c, tiffio.h: More ABI corrections.
	Removed SubsamplingHor/Ver from TIFFRGBAImage structure.  <a
	href="http://bugzilla.maptools.org/show_bug.cgi?id=1980">http://bugzilla.maptools.org/show_bug.cgi?id=1980</a>

	<li> libtiff/tif_jpeg.c: Avoid errors if the application
	writes a full strip for the last partial strip in a jpeg
	compressed file.  <a
	href="http://bugzilla.maptools.org/show_bug.cgi?id=1981">http://bugzilla.maptools.org/show_bug.cgi?id=1981</a>

	<li> libtiff/tiffio.h: GCC will now validate format
	specifications for TIFFError(), TIFFErrorExt(), TIFFWarning(),
	and TIFFWarningExt() in order to reveal bugs.  Cleaned up
	resulting warnings throughout for 32 bit build only.

	<li> libtiff/tiffiop.h: Add private type declarations for
	int64, and uint64 so that bundled utilities (like tiffcrop)
	can use it when necessary.

	<li> libtiff/tif_predict.c: Add support for 32bit integer
	horz. predictors.
	<a href="http://bugzilla.maptools.org/show_bug.cgi?id=1911">http://bugzilla.maptools.org/show_bug.cgi?id=1911</a>

	<li> libtiff/tif_luv.c: Fix handling of tiled logluv images.
	<a
	href="http://bugzilla.maptools.org/show_bug.cgi?id=2005">http://bugzilla.maptools.org/show_bug.cgi?id=2005</a>

	<li> libtiff/tif_write.c: do not override the planar
	configuration to be contig for one sample files if planar
	configuration is already set.  <a
	href="http://bugzilla.maptools.org/show_bug.cgi?id=2057">http://bugzilla.maptools.org/show_bug.cgi?id=2057</a>

	<li> libtiff/tif_lzw.c: Fix buffer underflow bug.  <a
	href="http://bugzilla.maptools.org/show_bug.cgi?id=2065">http://bugzilla.maptools.org/show_bug.cgi?id=2065</a>

	<li> libtiff/tif_luv.c: correct return codes from encoderow to
	be 1 on success instead of zero.  <a
	href="http://bugzilla.maptools.org/show_bug.cgi?id=2069">http://bugzilla.maptools.org/show_bug.cgi?id=2069</a>

	<li> libtiff/tif_print.c (TIFFPrintDirectory): Applied patch
	for "tag error may cause segfault in tif_print.c."  <a
	href="http://bugzilla.maptools.org/show_bug.cgi?id=1896">http://bugzilla.maptools.org/show_bug.cgi?id=1896</a>

</UL>

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<A NAME="tools"><B><FONT SIZE=+3>C</FONT>HANGES IN THE TOOLS:</B></A>

<UL>
	<li> tools/tiff2pdf.c: Fixed setting of alpha value per report
	on list.

	<li> tools/tiffsplit.c: Get rid of unsafe strcpy()/strcat()
	calls when doing the filename/path construction.

	<li> tools/tiff2pdf.c: More appropriate format string in
	t2p_write_pdf_string(); avoid signed/unsigned mismatch.

	<li> tools/tiffsplit.c: Use dynamically allocated array
	instead of static when constructing output file names.

	<li> tools/tiffcrop.c, man/tiffcrop.1: Incorporated
	significant functionality update from Richard Nolde.

	<li> tools/tiff2ps.c: Incorporated significant functionality
	update from Richard Nolde.  In particular, support for
	rotating the image by 90, 180, 270, and 'auto' has been added.

	<li> tools/tiff2ps.c: Remove spurious message printed to
	stderr.

	<li> tools/tiffsplit.c: fix sampleformat to be shortv instead
	of longv.

	<li> tools/{rgb2ycbcr.c, tiff2rgba.c}: Applied patch for
	CVE-2009-2347 libtiff: integer overflows in various
	inter-color space conversion tools.  <a
	href="http://bugzilla.maptools.org/show_bug.cgi?id=2079">http://bugzilla.maptools.org/show_bug.cgi?id=2079</a>

</UL>

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<A NAME="contrib"><B><FONT SIZE=+3>C</FONT>HANGES IN THE CONTRIB AREA:</B></A>

<UL> 

	<li> None

</UL>

Last updated $Date: 2016-09-25 20:05:46 $.

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